Toloto
Hyonan road authority, hubei 432000
Summary: road bridge construction and construction are more extensive, and the normative aspects of bridge reinforcement and maintenance technology are critical to the safe and smooth operation of the project. The level of management of the road bridge, which is an important phase of road engineering management, has had a significant impact on the quality of construction work. To this end, the construction unit will need to take effective measures to ensure the quality of the road bridge works, maximize the consolidation and maintenance of the dangerous bridge using modern technology and control the risks involved in the construction of the road bridge. This paper explores techniques for the construction and maintenance of dangerous bridges in road bridge construction。
Keywords: road and bridge works; dangerous bridges; enhanced construction; maintenance technology
1 introduction
The strengthening and maintenance of dangerous bridges in the road bridge project is an important means of improving the quality of the bridge and extending its useful life. Only by doing so will it be possible to increase the structural stability of the bridge, reduce the occurrence of diseases such as cracks, improve the carrying and resistance of the bridge and avoid loss and danger。
2 technologies for the consolidation of dangerous bridges in road bridge engineering
2. 1 in vitro pre-resilience reinforcement technology
At the heart of this technology application is the comprehensive mastery of the parameters of the bridge project, based on its original structure, to effectively reduce the level of reinforced construction. This technology has its own advantages, has greater stability on the ground and has been able to check the actual condition of the road bridge project at any time during the construction process, and is easier to follow up with maintenance and maintenance work, with the following main features of the common in vitro pre-resilic reinforcement techniques: (1) steel-coated. This technology works by operating along the basic line in the construction of the bridge with steel winch and pre-resilient steel wires, effectively treating the pre-resorture of the bridge's ribs in a stretching manner, and in order to ensure that the steel winch is in a reasonable position to set the parameters of the beam in the course of the construction; and (2) the reinforcement of the sub-strength pre-resilience pole. This technology consists mainly of three forms of consolidation, namely, straight-line, fold-based and hybrid, which typically use a fold-based reinforcement technique when the shear-resistant load on the tilted side of the bridge is reinforced, while a straight-line reinforcement technique is used when the straight side is handled on the bend-resistant load, which is typically used to strengthen the straight side of the road bridge. The application of in vitro pre-resilication techniques should focus on the welding of shift blocks to ensure that they can effectively transmit pre-resiliences and, for better deviation, can be accompanied by spring-beds between pine packs and axes。
2. 2 sticky pre-resilience reinforcement techniques
The technique is characterized by the reinforcement of road bridges through anchoring, the use of pre-resilience bands (required to be smaller diameters), the application of appropriate pre-reception and the injection of composite mortars to ensure pre-resilience bands in beams, as a reference to their pre-reception state. The beryllium can form a stable connection and a stable road bridge reinforcement system. The application of adhesive pre-resilience reinforcement has a strong advantage, with the use of simple anchor structures, sufficient stability, and zhang lai-gang being the more typical new technology in the area of road bridge consolidation. In terms of scope of application, it is feasible in small and medium-range steel blends and beams, and better applied in urban bridges, with improved construction efficiency while meeting the consolidation requirements through adhesive pre-resion。
2. 3 drilling injection pillar technology
In carrying out the basic construction of the injection pillar, it is essential that the hole be adequately protected against the problems of export congestion, based on the construction of arm structures in the area of the hole, the diameter and thickness of which must be selected in accordance with the relevant construction criteria. Proofing requires effective analysis and judgement based on the specific conditions of the construction site and the construction environment and the selection of scientifically sound drilling options for operation. In the production of cages, the design must be based on the drawing standard, which requires that the size of the material be selected, with sufficient assurance that the steel material is adequate, that the complete steel material is used, and that there is no significant welding of the steel material between them, resulting in a decrease in the stability of the entire cage structure. The placement of the cages must be carried out in accordance with the correct construction process to avoid adverse deformations. Concrete production is also a very important part of the drilling pillar construction process, requiring the matching of concrete and the quality control of raw materials to meet the specific construction requirements. Accordingly, the staff and construction designers are required to have sufficient knowledge and knowledge of the geological conditions within the construction area and the state of the environment, to conduct an effective and targeted analysis of the weather, climate and geological conditions at the construction site, to extract concrete material from the site to the specific time and to match the materials. The degree of concrete connectivity needed to be fully assured and the overall structural stability and safety of the pillar base improved effectively。
2. 4 bed hardening
The surface layer of the base bed in the bridging section of the road bridge shall be capable of controlling the elasticity and residual deformation generated by the vehicle load. Ensure that vehicles operate with good stability and comfort. When selecting base bed surface materials, high-quality materials that are more stable and rigid and have good water stability and a lower penetration factor should be selected. In bridging the road bridge, staff members eventually opted for the use of more stable grade gravel with greater elasticity, taking into account other success stories of the same type of work in the road bridge. In the course of the actual construction work, the construction staff also added appropriate fine particles to the grade gravel-based gravel, using such hybrid materials as base material, which can effectively enhance the impermeability of the base bed and ensure that the soil under the surface of the base bed remains of a high intensity character, thus effectively achieving the reinforcement of the road base。
3 technologies for maintenance of dangerous bridges in road bridge engineering
The scientific use of road bridge engineering and construction technology for repair and repair will primarily guarantee the safe use of infrastructure and enhance the overall efficiency of road bridge use. The issue of crack quality is an important factor affecting the quality of road bridges, so emphasis is placed on making effective repairs to cracks, combining the size of the cracks and the degree of improvement of their safe use as a whole through adaptive repairs. Repairs were made using slurry stitches to select materials with high hardness, such as epoxy resin. In the course of repairing the cracks, the construction staff was required to conduct a survey of the condition of the cracks on the road and to treat the surface by simple spraying, which was mainly applied to the application of selected materials on the surface to avoid the erosion of the bridge by infiltrations such as rainwater. This crack repair method can be used to form a protective layer on the surface of the bridge in order to avoid further damage to the bridge. If the crack is in a relatively large condition and the surface repair method is not applicable, the mass of the patch can be improved overall by deep repair, through a slurry method and through the scientific application of filling. For example, the application of filling methods is mainly to fill chemical reagents in cracks so that they can produce relatively greater resistance pressure in cracks and can effectively avoid serious damage. The use of slurry to repair cracks and of resin and other cement materials to impregnate cracks can also be effective in increasing resistance and improving the integrity of the bridge structure。
4 concluding remarks
In summary, for the construction of the critical bridge, timely maintenance measures are required to improve the quality of road bridge work, improve the quality of road bridge work, ensure structural beauty, improve structural carrying and stability, extend the life of the project and create favourable conditions for the safe and smooth movement of vehicles。
